Solve the system by substitution 0.5x + 0.25y = 36 y+18=16x

Evaluate the following expression 1/3^2

The marriott family bought a new apartment three years ago for $65,000. the apartment is now worth $86,515. assuming a steady rate of growth, what was the yearly rate of appreciation? what is the percent of the yearly rate of appreciation?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10